Under the emergency braking condition of the elevator,the brake wheel and brake shoe of the block brake weaken the strength of the brake under the action of friction and heating,which eventually leads to the thermal fatigue failure of the brake,so the thermal fatigue life of the brake is affected by the thermal-structural coupling characteristics.Considering the influence of the axial,radial and circumferential three-way stress fields on the stress field of the contact surface between the brake wheel and the brake shoe under the emergency braking condition,and the three-way stress distribution of the contact area between the brake wheel and the brake shoe is obtained,the thermal fatigue part of the brake during emergency braking is determined according to the simulation results of the thermal-structural coupling simulation of the brake.In the case of emergency braking,the Manson-Coffin formula is used to predict the thermal fatigue life of the brake wheel based on the S-N curve based on the material of the brake wheel,which provides a basis for the optimal design and maintenance of the elevator brake.
Elevator block brakesThermal-structural couplingThermal fatigue life predictionEmergency braking condition
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